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Sealants & Adhesives

Sealants and adhesives are essential for bonding, sealing, and protecting materials in construction and DIY projects. Whether you’re fixing, filling gaps, or creating waterproof seals, our range includes high-performance products suitable for a wide range of applications.

From grab adhesives for strong instant bonding to silicone sealants for flexible waterproof finishes, we supply reliable solutions for both trade professionals and home users.

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    Everbuild Stixall Crystall Clear 290ml (STIXCLEAR)

    Everbuild Stixall Extreme Power is the ultimate combined building adhesive and sealant, based on hybrid polymer technology, with the most Extreme power to both bond and seal virtually EVERYTHING to...
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    Evo-Stik Rapid Mitre Fix Adhesive Aerosol Large 50g / 200ml (30618788)

    EVO-STIK Mitre Adhesive kit is an easy-to-use, 2-part adhesive consisting of a 50g mitre glue and activator. It is designed primarily for instantly bonding the mitre joints of picture frames;...
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    Luxigraze Jointing Tape 200mm x 20m

    This strong, geotextile fabric is designed to be used in conjunction with Luxigraze Adhesive, to join artificial grass.
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    Ronseal High Performance Wood Filler Natural 1kg

    This Wood Filler is a high performing and incredibly tough product that repairs most types of wood damage. It is suitable for use on various parts of doors and windows, including sills and frames...
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    Ronseal Multi Purpose Wood Filler Medium 250g

    You can quickly fill internal gaps and cracks prior to painting, with our low cost decorators caulk. Its ideal for internal use on low-movement joints like window frames and skirting boards. And can...
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    Thompsons One Coat Water Seal 5 Litres

    Thompson's One Coat Water Seal uses a unique micro silicone emulsion to stop water penetration. Apply directly onto damp surfaces to provide long lasting waterproof protection within hours.
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    Thompsons Stain Blocking Damp Seal 750ml

    Thompson's Stain Block Damp Seal covers stains caused by leaking pipes and spills. It also seals damp patches prior to decorating.
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    Wykamol Enviroseal Damp Proofing 5 Litre

    Wykamol Enviroseal is a highly penetrative product that is suitable for a wide range of materials that are used above ground including porous brick, tiles (unglazed), leather, cement, and wood...
  • Bostik%20Flashband%20Original%20Length%2010m%20-%2030812185%2030812193%2030816347%2030812199%2030812201%2030812229%2030812238%2030812242.jpg.jpeg

    Bostik Flashband Self-Adhesive Tape Grey 10m x 300mm (30812229)

    The Flashband is a self-adhesive flashing tape manufactured by Bostik that bonds instantly to a wide range of building materials, providing a permanent, watertight seal in all climates. The flexible...
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    Bostik Pro Sealant S21 Multi Purpose Silicone Black 310ml

    A professional grade black S21 multi purpose Silicone Sealant. Features acetoxy silicone sealant for sealing glazing, frame and sanitary joints. This low modulus silicone sealant is suitable for...
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    Bostik Pro Sealant S31 Sanitary Silicone Grey 310ml

    The Bostik S31 Neutral Cure Sanitary Silicone Sealant is a professional grade, neutral cure silicone sealant developed for sealing sanitary joints that are continually exposed to moisture and...
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    Bostik Self Adhesive Flashband Tape Grey 10m x 75mm (30812193)

    Bostik Flashband Self-Adhesive Flashing Tape for roofs is a self-adhesive sealing bitumen strip, which bonds to provide a strong, watertight seal. It requires no separate adhesive. Bostik Flashband...
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    CT1 Construction Sealant & Adhesive Grey 290ml (535306)

    CT1 is the only product in the market with TRIBRID Technology, making it 360% stronger than a traditional Hybrid Polymer. If you're looking for a clean, sealant, look no further than CT1 White. This...
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    Everbuild 502 All Purpose Weatherproof Wood Adhesive 1 Litre

    502 All Purpose Weatherproof Wood Adhesive is a high quality, resin-based wood adhesive for all wood bonding applications.
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    Everbuild 502 All Purpose Weatherproof Wood Adhesive 5 Litre

    502 All Purpose Weatherproof Wood Adhesive is a high quality, resin-based wood adhesive for all wood bonding applications.
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    Evo-Stik Sticks Like Turbo Adhesive Clear 290ml

    EVO-STIK Sticks Like Turbo is a high-performance, fast-setting grab adhesive. The SM Polymer formulation can be used on almost all building materials and is both weather-proof and water resistant...
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    Evo-Stik Tile A Wall Non-Slip Adhesive Extra Large

    This Non-Slip Wall Adhesive is suitable for interior use to fix ceramic tiles. The adhesive is incredibly strong, offering excellent initial grab properties. The product is ready to use, without the...
  • Geocel%20310ml%20Clear%20Dow%20Corning%20785%20Sanitary%20Silicone%20Sealant.jpg.jpeg

    Geocel Dow Corning 785 Sanitary Silicone Sealant White 310ml

    This Sanitary Silicone Sealant from Geocel offers excellent adhesion to non-porous surfaces and is designed to seal areas around sanitary fittings such as toilets, urinals, sinks, baths, showers etc...
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    Soudal B2 Fire Class Trade Expanding Foam 750ml (128449)

    Hand Held Fire Rated one component, rapid curing expanding polyurethane foam filler by Soudal. Excellent thermal and acoustic insulation properties as well as great primerless adhesion on most...
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    Soudal Fix All White Triple Pack Adhesive 290ml (3 Pack) (131020)

    Super fast curing adhesive with exceptional final bond strength. Based on SMX Polymer Technology, Turbo has rapid strength build-up after 20 minutes, with final bond strength achieved in 3 hours. For...
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    Soudal Foam & Gun Cleaner Clear 500ml (116924)

    Aerosol applied, solvent based polyurethane foam cleaner, used for the cleaning of PU Foam applicator guns. Gun applied PU Foam valves and uncured PU Foam, can also be quickly and easily removed with...
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    Soudal Multi-Purpose Silicone Grey 270ml (131605)

    Acetoxy silicone sealant that cures to form a flexible, durable weathertight seal on many common building surfaces, including glass, metals, wood and ceramic tiles. Suitable for internal and external...
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    Soudal Soudafoam Fire Rated High Yield Gun Grade Pink 750ml (153085)

    A high yield fire rated, one component expanding polyurethane foam filler. 25% more yield than standard Soudafoam FR fire resisting foam. Excellent thermal and acoustic insulation properties. This...
  • Thompsons%20One%20Coat%20Patio%20%26%20Block%20Paving%20Seal.jpg.jpeg

    Thompsons One Coat Patio & Block Paving Seal

    Thompsons One Coat Patio & Block Paving Seal (5 litre) is all you need to fully protect your block paving and flag stones, prolonging longevity, whilst helping your path or driveway to remain...

Sealants & Adhesives

Grab adhesives

Ideal for strong, instant bonding without the need for nails or screws:

Perfect for flexible, waterproof sealing:

  • Bathroom sealants
  • Exterior silicone
  • Weatherproof sealants
  • Expanding foam

Used for filling gaps and insulation:

Specialist adhesives & sealants

Designed for specific materials and applications:

  • Wood adhesives
  • Masonry sealants
  • High-temperature sealants

Choosing the right sealant or adhesive

When selecting sealants and adhesives, consider:

  • Application – bonding, sealing, or gap filling
  • Environment – interior or exterior use
  • Water resistance – essential for bathrooms and outdoor areas
  • Material compatibility – wood, metal, masonry, or plastic

Complete your project

You may also need:

If you are working on a new project or renovating an existing outdoor space, pop into your local Howarth branch or browse our website. We also offer Click & Collect and Delivery options.

Shop Sealants & Adhesives by Type

Frequently Asked Questions

How to use silicone sealant?
To use silicone sealant, prepare the area that needs to be sealed, apply the sealant, smooth the sealant, and then leave it to dry.
How much tile adhesive do I need?
You will need 1.8kgs per 1mm depth per m2.
How to mix grout?
To mix grout, add water to the grouting powder in the manufacturer-recommend ratio. Tilt mixing bucket and stir with a grout-mixing knife. Then, adjust grout consistency by adding more powder or water. Let the grout rest for up to 10 minutes before using a grout knife to mix thoroughly once more.
How to use wood filler on a door frame?
To use wood filler on a door frame, start off by scraping out any flaking and splinters of paint from the damaged parts by using a wire brush. Then, it is important to soften or mix the filler as per instructions. It could involve stirring to the point of hardening, kneading until it softens, or mixing different substances until you get a similar colour. At this point, apply the ready filler on a putty knife. You will then scrape it onto the frame’s damaged area. After you’ve done that, allow a reasonable time for the filler to dry.
How to use expanding foam?
To use expanding foam, first clean the area, removing any debris and dirt to ensure there will be no contaminants. Put on disposable gloves to ensure you stay as safe as possible (as expanding foam can burn and will stick to your skin if it gets on you), prepare the can by removing the top and screwing in the applicator nozzle onto the valve, making sure not to use too much. Then, finally, shake the can well and then insert the nozzle into the hole you wish to fill, holding the can upside down for the best application. Make sure to leave the foam to set, which will take between 30 minutes and 12 hours depending on the amount of foam you’ve used. Once the foam has dried, you can cut and sand it down to the desired fit.
What is grab adhesive used for?
Grab adhesive is used for bonding materials quickly without the need for screws or nails.
What sealant is best for waterproofing?
Silicone sealants are commonly used for waterproofing due to their flexibility and resistance to moisture.
Can sealants be used outdoors?
Yes, exterior sealants are designed to withstand weather conditions and provide long-lasting protection.